active 1867-1892 M. (Mary) Lee

Mary Susanna Lee (1846–1908) and her sister Catherine Harriet Lee (1847–1914) were English writers best known for children's fiction published together as M. and C. Lee, or simply Mary and Catherine Lee. Born in London, they wrote mainly in the later 19th century, and their books show a clear fondness for historical storytelling.

Several of their best-known works are set against major moments in British history. Lucy's Campaign appeared in 1867, followed by Rosamond Fane in 1870 and The Oak Staircase in 1872; later books included Goldhanger Woods, The Family Coach, St. Dunstan's Fair, and Told after Tea. Their fiction was written for younger readers, often especially girls, and mixed adventure with domestic life and period detail.

Mary Lee also took part in the collaborative novel The Miz Maze, or the Winkworth Puzzle alongside Charlotte Mary Yonge and other writers. Contemporary notices suggest the sisters' books were warmly received by many young readers, and some titles were reprinted long after first publication. No confirmed portrait image was found from the sources reviewed, so a profile image is not included.